Or put another way, the new app creates a sort of “cap-and-trade” market for mobile data that helps users exceed the hard limits set on their consumption by rationing data with one another based on their needs at given times. Whether this app will prove popular with carriers is another question entirely, of course, which is why Air Mobs developer Eyal Toledano tells New Scientist that he’s been reluctant to put the app on the Google (GOOG) Play store for the time being. All the same, he thinks that Air Mobs is simply a practical solution for users who find themselves regularly plagued by overage fees or excessive roaming charges.

“If networks decided to collaborate and let all devices roam freely, Air Mobs would be less needed,” Toledano tells New Scientist. “But where operators aren’t collaborating, user-to-user collaboration can fix the situation.”